The origin of the infrared activity of rock salt is discussed in terms of the free vibrations of the crystal. Experimental data on the Reststrahlen frequencies and on the frequency displacements of scattered radiation are used to explain the spectroscopic behavior of rock salt in the near infrared.
© 1962 Optical Society of America
Original Manuscript: February 2, 1962
Published: May 1, 1962
C. V. Raman, "Optics in India: The Spectroscopic Behavior of Rock Salt," Appl. Opt. 1, 222-225 (1962)